NBC's Richard Engel reports on the latest round of violence in Iraq as President Obama rules out immediate air strikes and Iran's Rouhani announces his country will not hesitate to protect holy sites in Iraq.

Elon Musk, Tesla Motors CEO, is hopeful that people will be taken to planet Mars in the next 10-12 years and shares his vision for a multi-planetary life. Musk also weighs in on the price of the battery. CNBC's Julia Boorstin reports.

The Fed meeting begins. What Marc Faber, The Gloom, Boom & Doom Report, likes now and where he sees the market headed. With CNBC's Jackie DeAngelis and the Futures Now Traders, Jim Iuorio and Jeff Kilburg, both from the CME.

The "Squawk Alley" crew discusses Amazon's new smartphone and the WSJ's report it will be exclusively carried by AT&T. Investor Kevin O'Leary of "Shark Tank," explains why he thinks this is a big mistake for Amazon.

Patrick Doyle, Domino's Pizza president & CEO, discusses the company's investment in its new "Dom" app that enables users to order a pizza through voice recognition. Doyle says "voice" is going to be the primary interface in 5 or 10 years to interact with technology.

Bart Chilton, former CFTC commissioner, shares his thoughts on the high-frequency trading hearings taking place on Capitol Hill. Chilton says these hearings will bring transparency to the markets and that's a good thing.